good prop-firm with low fees

I am currently trading for big and known prop firm. However when I signed up I did not know much about this business and I agreed to high fees. Market orders for 100 shares on SDOT cost me $1.30 and limit orders on ARCA $0.70. I take 100% of profits but after commissions there is not much left. In Setember I have traded around 150,000 shares, and I paid around $2k in commissions and I had around $200 profit left for me. If I had lower fees, I would trade more shares, as on bad days I am done trading after 30 minutes since commissions add up quickly. I think I basically signed up through middleman who takes the portion of commission I pay in exchange for training which does not exist. Could you recommend me a company with low fees and good platform. I can pay percentage of profits in exchange of low fees. I have money for capital contribution.